Problem with MS SQL 2005 JDBC Conection

Question

Dear all,
I am new user of MS SQL Server 2005 database and Java developer.
When I conect to MS SQL Server 2005 i have a problem with conection.
First I creat new class named DaoTest to test MS SQL conection.
Here I show my code complete.
{color:#0000ff}
import java.sql.Connection;
import java.sql.Statement;
import com.microsoft.sqlserver.jdbc.SQLServerDataSource;
public class DaoTest {
private Connection connection;
public DaoTest() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
SQLServerDataSource ds = new SQLServerDataSource();
ds.setUser("sa");
ds.setPassword("deanweb");
ds.setServerName("localhost");
ds.setPortNumber(1434);
ds.setDatabaseName("common");
connection= ds.getConnection();
} catch (Exception e) {
e.printStackTrace();
public static void main(String[] args) throws Exception {
DaoTest daoTest1 = new DaoTest();
DaoTest daoTest2 = new DaoTest();
}{color}
{color:#000000}and when I run this class a error appeared:{color}
{color:#ff0000}com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset
at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSChannel.read(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.Prelogin(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.loginWithoutFailover(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDataSource.getConnectionInternal(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDataSource.getConnection(Unknown Source)
at DaoTest.<init>(DaoTest.java:21)
at DaoTest.main(DaoTest.java:32)
{color:#000000}But when i change main methol as{color}:
{color}{color:#0000ff}public static void main(String[] args) throws Exception {
DaoTest daoTest1 = new DaoTest();
daoTest1.connection.close();
DaoTest daoTest2 = new DaoTest();
}{color}
->>successful.
{color:#ff0000}{color:#000000}That mean I {color}**can not**{color} creat more than one instance of class DaoTest if i do not close {color:#000000}*daoTest1*'{color}s conection.
I only see this error with MS SQL Server,none in Postgres or HSQL.
Please help me.
Thank for reading and I am waiting for your reply.
sorry my english.
[email protected]
Edited by: DrNhut on Jun 24, 2008 3:39 AM
Edited by: DrNhut on Jun 24, 2008 3:44 AM

Answer 1

Thank you.
I try your code but it didn't work.
So,here my code with your opinion
String connectionUrl = "jdbc:sqlserver://localhost:1434;"
               + "databaseName=common;selectMethod=cursor;";
//                Declare the JDBC objects.
               Connection con = null;
               Statement stmt = null;
               ResultSet rs = null;
               try {
//                Establish the connection.
               Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
               con = DriverManager.getConnection(connectionUrl,"sa","deanweb");
               } catch (Exception e) {
               e.printStackTrace();
     public static void main(String[] args) throws Exception {
          DaoTest daoTest1 = new DaoTest();
          // daoTest1.connection.close();
          DaoTest daoTest2 = new DaoTest();
     }It throws same error with my last posted.
I can't use your code exactlyString connectionUrl = "jdbc:sqlserver://localhost:1434/common;selectMethod=cursor";because it throws a new exception:com.microsoft.sqlserver.jdbc.SQLServerException: The port number 1434/common is not valid.
     at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
     at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown Source)
     at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source)
     at java.sql.DriverManager.getConnection(DriverManager.java:582)
     at java.sql.DriverManager.getConnection(DriverManager.java:185)May be I change my DBMS instead of MS SQL 2005.
(I nead a database can manage big data.So,I choose MS SQL).
thank you.
DrNhut.
Edited by: DrNhut on Jun 25, 2008 6:39 PM